ICD-10-CM · FY 2026 APRIL UPDATE
A77
Spotted fever [tick-borne rickettsioses]
Diagnosis reference
Nonbillable categoryThis entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.
Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification
Related entries
Up to 30 descendants in this category
| CODE | DESCRIPTION | TYPE |
|---|---|---|
| A77.0 | Spotted fever due to Rickettsia rickettsii | Billable |
| A77.1 | Spotted fever due to Rickettsia conorii | Billable |
| A77.2 | Spotted fever due to Rickettsia siberica | Billable |
| A77.3 | Spotted fever due to Rickettsia australis | Billable |
| A77.4 | Ehrlichiosis | Category |
| A77.40 | Ehrlichiosis, unspecified | Billable |
| A77.41 | Ehrlichiosis chaffeensis [E. chaffeensis] | Billable |
| A77.49 | Other ehrlichiosis | Billable |
| A77.8 | Other spotted fevers | Billable |
| A77.9 | Spotted fever, unspecified | Billable |
Use the complete reference
This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.
Open official CMS files